When I drive my Zetor 4340, pressure slowly builds up in the brake circuit and after a while I have full brake and the play in the pedals has disappeared. If I open the rear air nipples and a little oil flows out, the whole system is reset. Is this a common fault and where should I look for the fault?
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question Brake goes stuck on its own over time - Zetor 4340
- Thread starter Tisselskog
- Start date
- Joined
- Sep 9, 2012
- Messages
- 1,222
- Location
- Wiedemar, Germany
- Dealer:
- Zetor parts
- First name
- Joachim
- Machinery:
- Zetor 2011, Zetor 5011, Zetor 7340 Economic, and also a Trabant and Wartburg
What brake fluid are you using? The 4340 should actually be compatible with DOT 4, but I would still stick with DOT 3 because DOT 3 is gentler on the rubber parts, especially if it's still NBR rubber.
- First, check the brake pedal play; it should be around 2-4 mm, especially when the bike is warm. If you have an air brake system, there may be other things to consider.
- Even if everything is OK, one or more of the brake hoses (not the steel lines) could have swollen or contracted internally, which can be caused by some DOT 4 brake fluids over time.
- First, check the brake pedal play; it should be around 2-4 mm, especially when the bike is warm. If you have an air brake system, there may be other things to consider.
- Even if everything is OK, one or more of the brake hoses (not the steel lines) could have swollen or contracted internally, which can be caused by some DOT 4 brake fluids over time.
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